Yongnuo YN622 YN-622C Wireless TTL Flash Trigger for Canon with 2 Receivers Yongnuo First Wireless E-TTL Flash Trigger YN-622 C is Released now, it's designed for Canon Camera. It supports FEC, FEB, FEL, High-speed Sync, 1st. Curtain, 2nd. Curtain, Modeling flash, ETTL II Group Ratio (ALL/A:B/A:B C), Manual/Multi group (ALL/ A:B/ A:B:C), Manual and Multi mode, Auto Zooming, Manual Zooming, AF Lamp. Using Digital FSK 2.4GHz frequency band with 7 channels, it has three mode, E-TTL ( II ), Manual and Multi, and it can fire flashes at 360 degree direction, the operating range is 100 metres. Suitable for camera: The EOS DSLR camera with external flash control menu: Canon 5D Mark II, 5D Mark III, 1Ds Mark III, 1D Mark IV, 1D Mark III, 7D 60D 50D 40D 450D 500D 550D 600D 650D 1000D 1100D;The EOS DSLR Camera without external flash control manual: Canon 5D 10D 20D 30D 300D 350D 1D 1D Mark II Suitable for flash: Compatible ETTL Flash: ( It suport wireless remote control through camera menu ) Canon 600EX ( RT ), 580EX II, 430EX II, 320EX, 270EX II,Yongnuo YN-565EX C, YN-468 II C, YN-467 II C, YN-465 C ( Our yongnuo flash units don't support HSS Function ); Note: 430EX and 580EX or other parts of flash is not supported remote control via the camera menu, you need to manually set the flash parameters.